Unlike the feeding mechanism of most tadpoles, which ingest

E. Unlike most tadpoles, which ingest an aqueous suspension of organic particles, the pipid tadpole of the African genus Hymenochirus consumes prey via predatory suction

only similar items can be compared

The fastest way to get this question is to home in on the answer choice that correctly compares 'tadpoles' and 'pipids.' Because the phrase, 'which ingest...', we know that we are not comparing feeding mechanisms. Just like that we arrive at (E), which correctly compares 'pipids' and 'tadpoles', and which uses 'which' to correctly modify tadpoles.

B. Unlike the feeding mechanism of most tadpoles, which ingest an aqueous suspension of organic particles, the feeding mechanism of the pipid tadpoles of the African genus Hymenochirus are characterized by predatory suction feeding.

The comparison is correct in this particular option as the mechanisms are being compared.
The anomaly is in "are" which should be "is" since "the feeding mechanism" is singular.

Unlike the feeding mechanism of most tadpoles, which ingest an aqueous suspension of organic particles, the pipid tadpoles of the African genus
Hymenochirus are predatory suction feeders.

A. Unlike the feeding mechanism of most tadpoles, which ingest an aqueous suspension of organic particles, the pipid tadpoles of the African genus Hymenochirus are predatory suction feeders. - Wrong Comparison

B. Unlike the feeding mechanism of most tadpoles, which ingest an aqueous suspension of organic particles, the feeding mechanism of the pipid tadpoles of the African genus Hymenochirus are characterized by predatory suction feeding. - verbal error

C. Unlike with the feeding mechanism of most tadpoles, which ingest an aqueous suspension of organic particles, the pipid tadpole of the African genus Hymenochirus consumes prey via predatory suction.- Same as 1

D. Unlike most tadpoles, which ingest an aqueous suspension of organic particles, the feeding mechanism of the pipid tadpole of the African genus Hymenochirus is characterized by predatory suction feeding. - Same as 1

E. Unlike most tadpoles, which ingest an aqueous suspension of organic particles, the pipid tadpole of the African genus Hymenochirus consumes prey via predatory suction - Correct

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